A US woman who shot and killed her husband and two adult children before taking her own life is thought to have committed the shocking crime as a result of being ostracised from the religion she was raised in.

Every time I tell a mate I’m doing a story on cryptocurrency, they invariably ask me the same two questions: should they invest their own hard-earned money, and which cryptocurrency will get them a Lamborghini/yacht/island quickest?

Labor queries worker rights in China deal

Labor is concerned the proposed free trade agreement with China could undermine Australian jobs.

The agreement, signed in Canberra last week but yet to be legislated, is expected to deliver thousands of new jobs and boost exports of goods and services.

The Labor caucus on Tuesday discussed the agreement, with some members suggesting the opposition should block the laws when they come to parliament.

Opposition Leader Bill Shorten told the meeting the government had not given due attention to the impact of making it easier for Chinese workers to enter the country through the provision of more work and holiday visas and "investment facilitation arrangements".

The arrangements would allow Chinese investors to bring in Chinese workers for large projects, working under Australian wages and conditions.

But Mr Shorten told the meeting the FTA had some good features and Labor must remain "a pro-free trade party".